nixCraft Linux & Unix Sysadmin/DevOps Tutorial Newsletter

[nixCraft]

Welcome to nixCraft Linux/Unix newsletter for Monday, 25 May 2020. I hope you will enjoy this version of the newsletter.

 

Newsworthy stuff for developers and Linux/Unix enthusiast

• Why is this website port scanning me?
  I had no idea WebSockets were used for port scanning local systems when you visited certain websites like eBay. Truly evil.
   
• OpenBSD 6.7 released
  OpenBSD is a secure, free computer operating system. It can run on many types of systems. OpenBSD version 6.7 has been released.
   
• Linux desktop setup 2020
  Here is the Linux desktop setup of Michael Stapelbergs. He is the author and creator of i3 dynamic tiling window manage and other opensource software. 

nixCraft Tutorials and HowTos 

• bat Linux command – A cat clone with written in Rust {trending}
  The cat (short for concatenate) command is one of the most frequently used flexible commands on Linux and Unix-like operating systems. Say hello to bat Linux command, which is a cat command written in Rust programming language. The bat command comes with syntax highlighting, git integration, and works as is a drop-in cat command replacement. Let us see how to install bat on Linux and Unix system for fun and profit.

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• How to find ulimit for user on Linux {trending}
  How can I find the correct ulimit values for a user account or process on Linux systems?
   
• How to extract tar.xz files in Linux and unzip all files
  How do I extract tar.xz files in Linux? Can you tell me command to unzip linux-5.6.13.tar.xz file? How can I uncompressing (or decompressing) all files in the current directory?
   
• How to install vim on CentOS 8 using dnf/yum
  I like VIM text editor a lot, and it is missing on my CentOS 8 box. How do I install vim on CentOS 8 Linux cloud server?
   
• Vi / VIM Find And Replace All Text Substitute Command
  I am a new Linux user. I started to use vim or vi text editor. How do I find all occurrence of the word called ‘eth0’ and replace it with ‘br0’ on Linux operating systems?
   
• Linux / UNIX : Move File Starting With A Dash ('-') {trending}
  In Unix or Linux operating systems, how do I move file(s) starting with a dash (e.g., /home/you/--filename.txt or /home/you/-filename.txt)? How do I copy a file whose name begins with dash/hyphen ("-")?
   
• How to limit SSH (TCP port 22) connections with ufw on Ubuntu Linux {trending}
  

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  How do I limit ssh connection attempts using UFW (Uncomplicated Firewall) on Ubuntu or Debian Linux server?
   
• How to set up MariaDB SSL and secure connections from clients {trending}
  I am looking to set up MariaDB SSL/TLS (Secure Sockets Layer) and secure connections from MySQL client and PHP/Python application. How do I enable SSL for MariaDB server and client running on Linux or Unix-like system?
   
• Search Multiple Words / String Pattern Using grep Command on Bash shell
  How do I search multiple strings or words using the grep command? For example I’d like to search word1, word2, word3 and so on within /path/to/file. How do I force grep to search multiple words? How can I grep for multiple patterns on Linux, OS X, FreeBSD, or Unix-like system? What is the command to search multiple words in Linux?
   
• How to delete KVM VM guest using virsh command
  I am a new Linux and KVM user. How do I delete a VM guest with virsh command line on Linux operating system? How do I delete a virtual machine called vps42 on Ubuntu or CentOS Linux server?
   
• How to check whether AMT is enabled and provisioned under Linux
  How do I check whether Intel Active Management Technology (AMT) and Intel Standard Manageability (ISM) enabled or disabled under Linux using command line for CVE-2017-5689 vulnerability?
   
• How To Enable and Install EPEL Repo on CentOS 8 {trending}
  How do I install the Extra Packages for Enterprise Linux (EPEL), such as Fedora EPEL repo on a CentOS Enterprise Linux server version 8.x? How to enable EPEL repo on CentOS 8?

Until next time.